645568299798 has 16 divisors (see below), whose sum is σ = 1294836135600. Its totient is φ = 214572843936.

The previous prime is 645568299787. The next prime is 645568299823. The reversal of 645568299798 is 897992865546.

645568299798 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154145065 + ... + 154149252.

It is an arithmetic number, because the mean of its divisors is an integer number (80927258475).

Almost surely, 2^645568299798 is an apocalyptic number.

645568299798 is an abundant number, since it is smaller than the sum of its proper divisors (649267835802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645568299798 is a wasteful number, since it uses less digits than its factorization.

645568299798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308294671.

The product of its digits is 2351462400, while the sum is 78.

The spelling of 645568299798 in words is "six hundred forty-five billion, five hundred sixty-eight million, two hundred ninety-nine thousand, seven hundred ninety-eight".